/Engine/Plugins/Online/OnlineSubsystem/Source/Public/OnlineSubsystemModule.h
Get the online subsystem associated with the given config string
pointer to the appropriate online subsystem
virtual [IOnlineSubsystem](API\Plugins\OnlineSubsystem\IOnlineSubsystem) * GetSubsystemByConfig ( const [FString](API\Runtime\Core\Containers\FString) & ConfigString, bool bAutoLoad )